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"In the world of spuds today"

A place to ask general spud cannon related questions.
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Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Tue Sep 05, 2017 8:56 am

With the accessibility of microcontrollers these days, there are definitely possibilities in terms of autoloaders that would not have been easily accessible as purely mechanical systems.
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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Tue Sep 05, 2017 6:09 pm

Staying with my love of all things single shot I am thinking a self loading single shot with a gravity fed tube of 10mm ball bearings. :idea:

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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Tue Sep 12, 2017 4:28 pm

Got the 1/2" valve, it's pretty sweet, all polymer body so it's pretty light, rated at 150 psi, good enough for me. :lol:

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Re: "In the world of spuds today"

Unread postAuthor: farcticox1 » Fri Sep 15, 2017 7:03 pm

My one day, some day, pistol layout, I have the QEV, barrel and trigger valve already, damn, it's nearly built then :o

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Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Fri Sep 15, 2017 8:32 pm

Are you going for higher pressure with this one?

I have one of these Cheap-o Chinese Pumps on the way just to see what it's capable of:

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4500 psi in a small chamber with a burst disk might make for some interesting supersonic testing.
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Re: "In the world of spuds today"

Unread postAuthor: jrrdw » Sat Sep 16, 2017 7:36 am

L0L, Show me the innards when you get it and I'll tell you how I would immediately upgrade it or use it as a working pattern to build a badd ass pump!

Disclaimer: The use of a line boring machine is required! :bigsmurf:
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Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Sat Sep 16, 2017 8:03 am

For that money it's not going to be a Hill I'm sure, but it should suit my light duty requirements. Since the biggest trouble with these seems to be overheating, I wonder if a simple jacket full of coolant would be an effective upgrade.
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Re: "In the world of spuds today"

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Re: "In the world of spuds today"

Unread postAuthor: jrrdw » Sat Sep 16, 2017 11:07 am

jackssmirkingrevenge wrote:Since the biggest trouble with these seems to be overheating, I wonder if a simple jacket full of coolant would be an effective upgrade.


It worked for Browning.
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Re: "In the world of spuds today"

Unread postAuthor: Zeus » Sun Sep 17, 2017 9:44 pm

ITWOST, I plan on some failure testing with various QEVs, using that exact same pump. $59 roobux shipped is $10 more than I paid for a pitiful shock pump.

My suspicions are that the wee little square 1/8" ones will survive at least 2kpsi, if not far more. The diaphragm is more likely to extrude out of the seat or the sealing face will rapidly exit the exhaust. But, I have a 1/8" nipple, a containment vessel and some earpro, so it should be a good experiment.
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Re: "In the world of spuds today"

Unread postAuthor: jackssmirkingrevenge » Mon Sep 18, 2017 5:06 am

Zeus wrote:I plan on some failure testing with various QEVs, using that exact same pump.


Sounds like a blast :D

The diaphragm is more likely to extrude out of the seat or the sealing face will rapidly exit the exhaust.


This is my feeling too, the diaphragm will fail long before the structure. IIRC they've been taken to the 600-700 psi range without failure but with increased wear on the diaphragm itself.

I have a 1/8" nipple


Mine are around 1/4"
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